Reducing-valve.



E. V. ANDERSON.

REDUCING VALVE.

APPLICATION FILED JUNE 8.1916.

Patented Aug. 7,1917.

/9 INVENTOR EDWARD W. ANDERSON, or MONESSEN,PEENNSYLV1NIA, AssIGNDR erQuartet/E m GHARLES'E. GOLDEN, or CRATTON,GPE'NNSYL3VANIA. v

za mwli et e T0 aZlw/wm it may concern:

' Be it known that 1,,EDXVARD V. Amara soN,-a citizen of the UnitedStates, residing at Monessen, in the State of Pennsylvania, haveinvented certain new and useful !Improvements in' Reducing-Valves, ofwhich ment of the parts more easy, and generally;

to improve the construction and operation of such valves. The inventionis illustrated in the accompanying drawing in which Figure 1 is avertical central section of a double-seated valve according to my inven-7 tion, and Fig. 2 shows a similar section of a modified form in whichthe valve operates a little diflerently.

Probably the most satisfactory pressure reducing valve employs adiaphragm under pressure of the line on the outlet side of the mainvalve, but heretofore such valves have had the danger that in case thediaphragm became perforated in any way the reducing valve would fly openand allow high pressure to enter the low pressure service line. This Iavoid by placing the dashpot under the diaphragm, and I incidentallyrender the valve very sensitive and secure other advantages by sucharrangement.

Thus in the drawing, Fig. 1, it will be seen that there is a valvecasing 3 provided with a double perforated partition 4 forming valveseats 5 and 6 (of which the latter is preferably smaller in diameterthan the former.) On these is seated the double disk valve 7 8, havingits upper stem 9 guided in a socket 10 made art of a cap 11 of the maincasing 3. The ottom stem is provided .with an extension rod 12 whichpasses downward through a supplemental casing 13 and through a diaphragmcasing 14 containing a-diaphragm 15, and at the bottom is supplied witha packed piston 16 which works within the cylindrical casing extension17 being secured to the hollow disk 18 screwed on the bottom of thesupplemental casing 13. Bearing against the bottom of the rod 7 I,Specificatipnpf Lettersi l atent.

both opening and closing.

. I Pat ilte lic u 751 115 12 is -agyo' ke 1 9 normally urged .upward'bytwo rods 20' and 21 inside {the coil springs and 23 adjusted by'means offollowers' -and nuts "24, -25, as shownz- *It ;w-i ll7be undersfi Odthat --there, is leakage 'jbetween rod 12 and the openings'an the casingand1 3,

so that the fluid from the outlet side of the Obviously if the pressureat (O) falls, -the springs will openthe valve wider, and if it rises thepressure on the diaphragm 15 will partly close the valve against thesprings There is thus maintained a very nicely balanced condition andpressure at the outlet side depending entirely upon the tension of Vsprings 22 and 23.-

The bottom dashpot piston 16 is packed in the cylinder 17, and of coursewill retard and regulate the movements of the valve in case thediaphragm 15 should become broken or perforated, this will not result,as has heretofore been the result, in relieving the effect of the lowpressure in maintaining the valve in a balanced condition,'but saidpressure will simply take effect on the disk 16, which is of the samediameter as-the diaphragm l5,'and while there will be a slight leakagethe valve will continue to operate as before until'repairs are made.

In Fig. 2, the arrangement is as before described except that the casing3* has a single perforated partition 4 and a single valve seat 25accommodating a single valve 26 which is provided with a more refinedform rrED STATES PATENT OFEIQE Moreover, in a interior of cylinder 80.This cylinder carries integral with it a small puppet valve 32 held downupon the seat 33 by a coil spring 34; maintained in a perforated cap 35.By this means the pressure from the outlet side is permitted to enterthe space marked (A) but not to escape therefrom, with the result thatthe pressure in the chamber (A) is never less than the pressure at theoutlet side marked (0) and the valve in opening always operates, againstthe pressure actually existing on the outlet side of the main valve.This, it will be seen, is the sameas the pressure on the diaphragm 15and assists in the nicety of the balance attained by adjusting the nuts24, 25 on the coil springs.

Having thus described my invention and illustrated its use, what I claimis the following:

1. A pressure reducing valve comprising the combination with a mainvalve casing and valve therein, of two supplemental pressure chambersand pistons therein subject ed to the pressure on the outlet side of thebalance the fluid pressure in said supplemen- &

tal chambers.

2. A pressure reducing valve comprising a main valve casing having aperforated partition, a valve seated therein, a piston attached to thestem of the valve and forming in conjunction with the casing, a dashpot,ports and a supplemental valve adapted to maintain "in said dashpotalways the pressure on the outlet side of the main valve, a supplementalstem to the main valve carrying another piston and a flexible diaphragminside the same, a supplemental casing con taining a space limited bysaid diaphragm, and adjustable springs adapted to exert pressure on thesupplemental valve stem in opposition to the outlet pressure on saiddiaphragm.

In testimony whereof I have hereunder signedmy name.

EDWARD 7V. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

